Fourth to charles frederick



' (NoModeL) J. FREDERICK.

NUT LOCK. No. 252,655. Patented Jai1.24,1882.

I Attorney UNITE STATES OFFICE.

JOHN FREDERICK, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- FOURTII TO CHARLES FREDERICK, OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 252,655, dated-Tannery 24, 1852.

Application filed July 27, 1881. (No model.)

To all whom it may concern Be it known that I, JOHN FREDERICK, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Nut-Locks; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanyingdrawings, and

to the letters of reference marked thereon.

My invention relates to an improvement in nut-lock and fish-plate combined for coupling together railway-rails; and it consists in constructing the'fish-plate with a recess in its outer face, in combination with a washer, the contour of which is that of a keystone, having recesses for pivoting thereto a spring-yoke for straddling the nut of the bolt for the purpose of preventing it from turning thereon.

To enable others skilled in the art with which my invention is most nearly connected to make and use it, I will proceed to describe its construction and operation.

In the accompanying drawings, which form part of my specification, Figure 1. is a side elevation, representing a section of a rail and a section of a fish-plate with the bolt, washer,

nut, and yoke. Fig. 2 is a transverse section of Fig. 1 atline yy. Fig. 3 is a front face view of the washer. Fig. 4 is an edge View of the same. Fig. 5 is a rear face view of the same. Fig. 6 'is a face view of nut. Fig. 7 represents the spring-yoke. Fig. 8 represents a combination of the bolt, washer, nut, and yoke and their relation to each other.

Reference being had to the accompanying drawings, A represents the rail, which is of ordinary construction.

B represents the fish-plates, which are recessed on their outer face, as shown in Fig. 2.

C represents the washer, the contour of 40 which is that of a keystone, and is provided with an opening, 1), and recesses c for the reception of the pivot-'pointsfof a spring-yoke, g, the form of which is clearly'shown in Fig. 7.

It represents the bolt, which is of ordinary construction, having screw-nut i. The fishplates are placed upon the rail for the purpose of coupling them together, and the bolt passed through the openingjin the fishplate and rail, with the head of the bolt in the recess of one of the fish-plates, and the washerC slipped over the bolt and into the recess of the other fish-plate, with the pivot-points of the springyoke g placed in the recesses e of the washer C with the yoke turned up. The screw-nut i is then screwed onto the bolt, after which the. yoke is turned down over said nut, as

JOHN FREDERICK.

Witnesses:

A. O. JOHNSTON, CHAS. FREDERICK. 

